javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - test - wide gamut</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
		<style>
			.container {
				position: absolute;
				overflow: hidden;
				width: 100%;
				height: 100%;
			}

			.slider {
				position: absolute;
				cursor: ew-resize;

				width: 40px;
				height: 40px;
				background-color: #F32196;
				opacity: 0.7;
				border-radius: 50%;

				top: calc(50% - 20px);
				left: calc(50% - 20px);
			}

			.label {
				position: fixed;
				top: calc(50% - 1em);
				height: 2em;
				line-height: 2em;
				background: rgba(0, 0, 0, 0.5);
				margin: 0;
				padding: 0.2em 0.5em;
				border-radius: 4px;
				font-size: 14px;
				user-select: none;
				-webkit-user-select: none;
			}
		</style>
	</head>

	<body>

		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - wide gamut test<br />
		</div>

		<div class="container">
			<div class="slider"></div>
			<p class="label" style="left: 1em;">sRGB</p>
			<p class="label" style="right: 1em;">Display P3</p>
		</div>

		<!-- Import maps polyfill -->
		<!-- Remove this when import maps will be widely supported -->
		<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import WebGL from 'three/addons/capabilities/WebGL.js';

			let container, camera, renderer, loader;
			let sceneL, sceneR, textureL, textureR;

			let sliderPos = window.innerWidth / 2;

			const isP3Context = WebGL.isColorSpaceAvailable( THREE.DisplayP3ColorSpace );

			if ( isP3Context ) {

				THREE.ColorManagement.workingColorSpace = THREE.LinearDisplayP3ColorSpace;

			}

			init();

			function init() {

				container = document.querySelector( '.container' );

				sceneL = new THREE.Scene();
				sceneR = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 0.1, 100 );
				camera.position.z = 6;

				loader = new THREE.TextureLoader();

				initTextures();
				initSlider();

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setScissorTest( true );
				renderer.setAnimationLoop( render );
				container.appendChild( renderer.domElement );

				if ( isP3Context && window.matchMedia( '( color-gamut: p3 )' ).matches ) {

					renderer.outputColorSpace = THREE.DisplayP3ColorSpace;

				}

				window.addEventListener( 'resize', onWindowResize );
				window.matchMedia( '( color-gamut: p3 )' ).addEventListener( 'change', onGamutChange );

			}

			async function initTextures() {

				const path = 'textures/wide_gamut/logo_{colorSpace}.png';

				textureL = await loader.loadAsync( path.replace( '{colorSpace}', 'srgb' ) );
				textureR = await loader.loadAsync( path.replace( '{colorSpace}', 'p3' ) );

				textureL.colorSpace = THREE.SRGBColorSpace;
				textureR.colorSpace = THREE.DisplayP3ColorSpace;

				sceneL.background = containTexture( window.innerWidth / window.innerHeight, textureL );
				sceneR.background = containTexture( window.innerWidth / window.innerHeight, textureR );

			}

			function initSlider() {

				const slider = document.querySelector( '.slider' );

				function onPointerDown() {

					if ( event.isPrimary === false ) return;

					window.addEventListener( 'pointermove', onPointerMove );
					window.addEventListener( 'pointerup', onPointerUp );

				}

				function onPointerUp() {

					window.removeEventListener( 'pointermove', onPointerMove );
					window.removeEventListener( 'pointerup', onPointerUp );

				}

				function onPointerMove( e ) {

					if ( event.isPrimary === false ) return;

					sliderPos = Math.max( 0, Math.min( window.innerWidth, e.pageX ) );

					slider.style.left = sliderPos - ( slider.offsetWidth / 2 ) + 'px';

				}

				slider.style.touchAction = 'none'; // disable touch scroll
				slider.addEventListener( 'pointerdown', onPointerDown );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				containTexture( window.innerWidth / window.innerHeight, sceneL.background );
				containTexture( window.innerWidth / window.innerHeight, sceneR.background );

			}

			function onGamutChange( { matches } ) {

				renderer.outputColorSpace = isP3Context && matches ? THREE.DisplayP3ColorSpace : THREE.SRGBColorSpace;

				textureL.needsUpdate = true;
				textureR.needsUpdate = true;

			}

			function containTexture ( aspect, target ) {

				// Sets the matrix uv transform so the texture image is contained in a region having the specified aspect ratio,
				// and does so without distortion. Akin to CSS object-fit: contain.
				// Source: https://github.com/mrdoob/three.js/pull/17199

				var imageAspect = ( target.image && target.image.width ) ? target.image.width / target.image.height : 1;

				if ( aspect > imageAspect ) {

					target.matrix.setUvTransform( 0, 0, aspect / imageAspect, 1, 0, 0.5, 0.5 );

				} else {

					target.matrix.setUvTransform( 0, 0, 1, imageAspect / aspect, 0, 0.5, 0.5 );

				}

				target.matrixAutoUpdate = false;

				return target;

			}

			function render() {

				renderer.setScissor( 0, 0, sliderPos, window.innerHeight );
				renderer.render( sceneL, camera );

				renderer.setScissor( sliderPos, 0, window.innerWidth, window.innerHeight );
				renderer.render( sceneR, camera );

			}

		</script>
	</body>
</html>